On Wed, Mar 16, 2016 at 09:29:59AM +0100, Vincent Guittot wrote: > I wonder if it's really worth passing per sched_class request to > sched_util ? sched_util is about selecting a frequency based on the > utilization of the CPU, it only needs a value that reflect the whole > utilization. Can't we sum (or whatever the formula we want to apply) > utilizations before calling cpufreq_update_util
So I've thought the same; but I'm conflicted, its a shame to compute anything if the call then doesn't do anything with it. And keeping a structure of all the various numbers to pass in also has cost of yet another cacheline to touch.
